Cephalaspida

例句：

1. 1.Cephalopods are a diverse group of marine animals.
   头足纲动物是一类多样化的海洋动物。
2. 2. The discovery of new species in the deep sea is exciting for scientists.
   在深海中发现新物种对科学家来说令人兴奋。
3. 3. Cephalopods have unique adaptations for swimming and hunting in their environment.
   头足纲动物具有独特的适应性，用于在水中游泳和狩猎。